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Subject: How do you amplify a differential DC voltage in the microvolt range??

Date: 04/29/02 at 9:47 AM
Posted by: C.Finucane
E-mail: ciaranfinucane@yahoo.com
Message Posted:

I'm designing a DC differential amplifier to pick up bioelectric signals in the DC-30Hz range with an amplitude of 50-3500 microvolts? Impossible or just extremely hard?? The main problems are drift and DC offset.Can these be eliminated without the use of an "intelligent system" as I was hoping to use a purely analog design.
Does anaybody have experience in this area or any tips in designing such a sensitive amplifier.
Any help would be appreciated.
Thanks
C


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